Title: Method and device for evaluating light rays characteristic and device for regulating its writing unit
Application Number: 98117250 Application Date: 1998.06.25
Publication Number: 1208867 Publication Date: 1999.02.24
Approval Pub. Date: 2004.10.20 Granted Pub. Date: 2004.10.20
International Classifi-cation: G03G15/04
Applicant(s) Name: Ricoh Co., Ltd. Address:
Inventor(s) Name: Shinichi Ozaki;Katsushi Abe;Nobuhiro Takahashi
Attorney & Agent: huang jianfeng
Abstract:
    The present invention discloses a method of evaluating characteristics of a light beam, a light beam characteristic evaluation apparatus, and an apparatus for adjusting a write unit. The characteristics of a method of evaluating characteristics of a light beam lies in that a beam light source which is used to scan a face to be measured linearly is turned on during its scanning operation during the scanning time corresponding to one dot, and the characteristic which is required from a light beam is evaluated, which can accurately evaluate the diameter of the light beam and the shape of the light beam.
Time: 9